Chapter 1 - Introduction to System Integration and Architecture.pdf

System Integration and Architecture

1. Describe the fundamental aspects of system integration and architecture.
2. Determine problem solving of system integration in an organization.
3. Display managerial skills in planning system integration within a specific application domain.

 Basic Concepts and
Definitions
 System Architecture Model
 System Integration Life
Cycle
 System Architecture as a
Profession

 System Integration
 Systems integration means that you
allow a heterogeneous Information
System (IS) to communicate or
integrate and share information (or
data) seamlessly with one another

 Enterprise Application Integration (EAI)
 Enterprise Application Integration, or EAI, has
existed as a technical term since the early
2000s, but the central problem that it attempts
to solve is much older.
 In a nutshell, EAI is an approach, or more
accurately, a general category of approaches,
to providing interoperability between the
multiple disparate systems that make up a
typical enterprise infrastructure.

 Enterprise architectures
 Enterprise architectures, by
their nature, tend to consist of
many systems and applications,
which provide the various
services the company relies
upon to conduct their day to
day business.

 Silos are basically compartmentalized operating
units isolated from their environment.
 Functional Silos
 Functional silos in a business are teams of employees,
grouped by function, that all operate separately from
each other, without cross-collaboration.
 Horizontal Silos
 Classification of organizations into departments like
Accounting and Human Resources, reflects the
breaking of complex tasks into smaller manageable
tasks that could be assigned to a group of people who
could then be held responsible.
 Vertical Silos
 Organizations also divided roles in hierarchical layers
from strategic planning to management control and
operation control

 Vertical integration
 (as opposed to "horizontal integration") is
the process of integrating subsystems
according to their functionality by creating
functional entities also referred to as silos
 Star integration
 also known as spaghetti integration, is a
process of systems integration where each
system is interconnected to each of the
remaining subsystems.
 When observed from the perspective of the
subsystem which is being integrated, the
connections are reminiscent of a star, but
when the overall diagram of the system is
presented, the connections look like
spaghetti, hence the name of this method.
 Horizontal integration
 Enterprise Service Bus (ESB) is an
integration method in which a
specialized subsystem is dedicated to
communication between other
subsystems.
 This allows cutting the number of
connections (interfaces) to only one per
subsystem which will connect directly to
the ESB.
 A common data format
 is an integration method to avoid every
adapter having to convert data to/from
every other applications' formats,
Enterprise application integration (EAI)
systems usually stipulate an application-
independent (or common) data format

 Information Systems in Organizations
 Information Systems are a critical component of a successful organization today.
 Information Systems play a major role in primary and secondary activities of an organization’s
value chain.
 The evolution of IS suggests that its role has generally been to support evolving information
needs of the organization.
 Information Systems provide a high level of computer automation to support business
functions such as: Accounting, Finance, Marketing, Customer Service, Human
Resource Management, Operations, Manufacturing
 Supporting horizontal silos of organization
 Information systems provide analytical and decision making support for management, which
is generally categorized into three levels- Strategic, Middle, and Operational.
 Supporting vertical silos of organization

 A system architecture or systems
architecture is the conceptual model that
defines the structure, behavior, and
more views of a system.An architecture
description is a formal description and
representation of a system, organized in a
way that supports reasoning about
the structures and behaviors of the
system.
 A system architecture can consist of
system components and the sub-
systems developed, that will work
together to implement the overall
system.
 There have been efforts to formalize
languages to describe system
architecture, collectively these are
called Architecture Description
Languages (ADLs).

 1. Requirement's definition and
specification
 2. Feasibility Analysis
 3. System Architecture Development
 4. Management Plan: program and project
plan
 5. Systems Design: logical and physical
design
 6. Implementation: design implementation,
system tests, and operational deployment
 7. Evaluation: system review and plan for
replacement

 SYSTEMS PLANNING
 The objective of the Systems Planning phase is
to develop the long-range systems plan for the
implementation of an integrated, automated
environment within an organization.
 PROJECT INITIATION
 Project Initiation is the first phase in
undertaking any of the systems projects
identified in the Long-Range Systems Plan.
 Its objective is to lay a proper foundation for
the project, by establishing the relationship
between the systems project and the Long-
Range Systems Plan, by identifying key project
personnel, and by establishing that there is
adequate funding and commitment.
 ARCHITECTURE DEFINITION
 The objective of the Architecture Definition
phase is to confirm and refine the high-level
conceptual solution identified during the
systems planning phase into an optimum
solution to the problem, in the context of the
environment, requirements and financial
resources available.
 ANALYSIS
 The objective of the Analysis phase is to
specify the proposed solution in detail.
 This involves further refining the requirements
from the Architecture Definition phase.

 DESIGN
 Basically, the Analysis phase specifies in detail
'what' the system will do.The Design Phase
specifies 'how' the application software will
accomplish this.
 DEVELOPMENT
 The objective of the Development phase is to
construct and test all of the system components. In
this phase the system is tested by both developers
and users. In addition, all user aids are completed.
 FACILITIES ENGINEERING
 The objective of the Facilities Engineering phase is
to create the physical environment including
construction of data centers and installation of
hardware, and to document this for future
reference and expansion needs.
 IMPLEMENTATION
 The objective of the Implementation phase
is to make the new system operational.
The application software is installed, users
are prepared and trained, data files are
converted and the application systems and
procedures are made operational.
 POST-IMPLEMENTATION SUPPORT
 The objective of the Post-Implementation
phase is to maintain and enhance the
system to meet the ongoing needs of the
user community

 Systems architects are computer
professionals, who design,
implement, and maintain databases
and complex computer systems.They
plan projects and activities, solve
architectural issues, and maximize
quality and efficiency throughout the
network or system. Systems
architects might work long hours to
address database issues without
interrupting a company's workday.
Degree Level Bachelor's degree
Experience
Computer science or software
engineering
Licensure and
Certification
Voluntary; the Information Technology
Infrastructure Library (ITIL) or Project
Management Professional (PMP)
certification is preferred
Key Skills
Customer service skills; excellent
speaking and writing skills;
experience with Microsoft Windows
and Server software, Linux,TCP/IP and
relevant software applications
Salary*
$106,430 per year (median salary for
systems architects in 2016)
https://study.com/articles/Become_a_Systems_Architect_Step-by-Step_Career_Guide.html

Chapter 1 - Introduction to System Integration and Architecture.pdf

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